The inn's name comes from a mystery titled Seven Keys to Baldplate by Earl Derr Biggers, which was about an inn located in New York named Baldplate. Each guest was given a key. Diggers, upon visiting the inn here in Estes Park, declared that it was exactly as he imagined the one in his novel to be. The Mace's then started to give away keys to the inn. This stopped during WWI when metal became very expensive. But guests started to bring keys to the inn and eventually the Mace's began to display them. The inn has keys from notable places such as the Pentagon, Westminster Abbey, and Mozart's wine cellar. The collection is in the process of being catalogued.
Also displayed at the inn is a great collection of photographs, most of which were taken by Charles, and Stuart, both of whom were professional photographers. Sadly, Stuart died of pneumonia in 1920 but Charles lived on to have a long career in the medium. He served in the Army as General Pershing's personal photographer during the war, and then worked Denver newspapers. He photographed several famous people such as Theodore Roosevelt, Thomas Edison, and Woodrow Wilson (it is not clear which, if any, famous person Stuart photographed).